Hinge for a stove door

ABSTRACT

The invention relates to a hinge for a stove door, comprising a housing ( 1 ) in which a plug-in part ( 2 ) is rotationally ( 10 ) mounted. In order to be able to easily influence the torque produced by the spring, a spring guide ( 3 ) which is loaded by a spring ( 6 ), preferably a pressure spring, is provided, said spring guide being fitted with roller ( 15 ) that is guided through a curved section ( 9 ) of the plug-in part ( 2 ).

[0001] The invention relates to a hinge for a stove flap, which can alsobe referred to as a “stove hinge”, according to the preamble to claim 1.

[0002] Such stove hinges are already known in the art. They generallyhave a casing to which is pivoted a plug-in part. The casing is securedto the stove flap. The plug-in part is inserted into the stove or stovecasing, e.g., a side wall, or otherwise fastened there. However, it isalso possible to secure the casing to the stove and then plug-in part tothe stove flap. The casing can essentially be shaped like a box. Thepivot axis can be in a corner of the casing, e.g., in a lower outsidecorner, in particular at the location of the casing facing away from thesegment of the plug-in part extending out of the casing.

[0003] Stove hinges of this kind often have a spring intended to offsetthe weight of the stove flap. The stove flap is normally pivoted to ahorizontal axis on the front side of the stove, wherein the stove flapis situated vertically over the pivot axis in the closed position, andcan be pivoted to the outside up to an angle of 90°. During thispivoting process, the opening torque of the stove flap increases inessentially a sinusoidal pattern. The spring of the stove hinge makes itpossible to offset this opening torque (door torque) of the stove flap.In addition, the spring can also generate a certain locking force of thestove flap in its closed position.

[0004] The object of the invention is to propose a stove hinge withwhich torque generated by the spring can be easily influenced.

[0005] According to the invention, this object is achieved by thecharacterizing features of claim 1. The hinge encompasses a spring guideloaded by a spring. This spring is preferably a torsion or flat spiralspring. The spring guide is provided with a roll guided into a cam plate(pitch cam, guide track) of the plug-in part. However, it is here notabsolutely necessary that the roll execute a rolling motion. Instead ofan actual roll, use can also be made of another guide element that isrigid in design and can pivot while sliding along the cam plate or guidetrack. The roll or other guide element can be guided into the camp lateor guide track. However, it can also traverse the cam plate or guidetrack in another manner.

[0006] The cam plate layout can influence the torque exerted by thehinge on the stove flap. This torque depends on the progression andinclination of the guide track, and the achieved rotational angle oropening angle. The initial stress of the spring is controlled over theprogression of the guide track. Special settings, lock-in positionsand/or closure moments can be achieved via the inclination of the guidetrack.

[0007] Advantageous further developments are described in the subclaims.

[0008] The spring is preferably designed as a compression spring. Acompression spring, in particular a torsion spring, placed underpressure is less susceptible to vibration than a tensioned spring, sothat less disturbing noises are generated. However, a tension spring canalso be used.

[0009] Another advantageous further development is characterized in thatthe roll is provided on an outwardly facing bracket of the spring guide.The roll is preferably located outside the hinge casing. As a result,the distance, and hence the lever arm force, between the pivot axis ofthe hinge and roll can be increased, making it possible to betterutilize the force of the spring. Accordingly, it is also possible to usesmaller springs and make do with lower spring forces. Lowering thespring force enables weaker and smaller hinges, since the hingecomponents now just have to absorb lower forces.

[0010] In another advantageous further development, the cam plate has aninclination in the closed position of the hinge that generates therequired closing force. Legal regulations stipulate that stove flapsmust reach a specific closing force. This closing force can be easilygenerated via the corresponding inclination of the cam plate.

[0011] Another advantageous further development is characterized in thatthe cam plate has a neutral section at a certain open position of thehinge. In this case, the opening angle is preferably 200, forming theso-called “grill stop”. However, the angle can also lie between 10° and30°, and even exceed this in specific instances. The neutral section ofthe cam plate triggers the “grill stop” of the stove flap at apredetermined opening angle.

[0012] The cam plate is preferably designed in such a way that thespring force generated by the cam plate progression essentially offsetsthe opening torque or door torque of the stove flap. If the cam platehas an inclination generating the required closing force in the closedposition of the hinge, and/or if the cam plate has a neutral section ata certain open position of the hinge, the mentioned advantageous furtherdevelopment can be designed in such a way that the spring forcegenerated by the cam plate progression essentially offsets the openingtorque of the stove flap in those areas lying outside the closedposition and/or specific open position.

[0013] The spring guide is preferably guided in the casing. This guidingmechanism is preferably achieved using a support, wherein the supportpreferably consists of plastic or some other suitable material.

[0014] Another advantageous further development is characterized in thatthe lever arm force of the roll can be varied relative to the pivot axisof the plug-in part. It is advantageous for the spring guide to have aguide pin that extends into another cam plate of the casing. However, itis also possible to provide the guide pin in the casing and theadditional cam plate in the spring guide. Changing the length of thelever arm force between the roll and pivot axis that can be generated bymoving the spring guide relative to the casing makes it possible toadditionally influence the torque exerted by the hinge on the stoveflap. The spring guide can be moved via the other cam plate (pitch cam,guide track), so that the lever arm of force of the acting spring forcecan be varied relative to the fulcrum of the plug-in part. The torque iscontrolled by superposing the effects of the cam plate of the plug-inpart and additional camp plate. This makes it possible to expand therange of influence on the torque. Further, the physical size of thehinge can be reduced.

[0015] The initial stress of the springs can be variable. It isadvantageous that a stop be adjustable for the springs. This stop can bedesigned as a nut, or encompass a nut, so that turning it can produce achange in the initial spring stress. The arrangement is preferably suchthat the nut or other component can be adjusted by hand to vary theinitial spring stress. The hinge can be adjusted to various stove flapsby changing the initial spring stress.

[0016] Another advantageous further development is characterized in thata locking part is connected with the plug-in part. The locking part ispreferably pivoted. It is advantageous for the pivot axis of the lockingpart to be shiftable. The locking part can have a wedge. The lockingpart preferably has an actuating projection.

[0017] In another advantageous further development, the locking part hasa face that forms a stop surface. As a result, a reliable locking effectcan be achieved even if the dimensions of the locking part and/or partsinteracting with it deviate from the prescribed values due tomanufacturing tolerances and/or wear.

[0018] It is advantageous if the distance between the face and pivotaxis of the locking part widens as the locking part increasingly swivelsout. In this way, the locking effect will be sufficient even when ifdistance between the pivot axis and the part interacting with the faceof the locking part, e.g., a corner of the counter-bearing, should begreater than prescribed due to manufacturing tolerances, and or becomegreater over time due to instances of wear.

[0019] The face is preferably curved. In an advantageous furtherdevelopment, the face has a contour shaped like a circular arc, or atleast essentially shaped like a circular arc, wherein the midpoint ofthe circular arc is spaced apart from the pivot axis of the lockingpart. As a result, the distance between the face and pivot axis of thelocking part can widen as the locking part increasingly swivels out.

[0020] The invention also relates to a stove flap and/or a stove. Inpreviously known stove flaps, it is often necessary to use two hinges.If the stove flap needs a counterweight, each of the hinges inpreviously known solutions must have a counterweight comprising arelatively strongly dimensioned spring.

[0021] Another object of the invention is to propose a simplified stoveflap.

[0022] According to the invention, this object is achieved by a hingeaccording to the invention and a dummy flange with a casing to which aplug-in part is pivoted. The hinge according to the invention makes itpossible to completely implement the counterweight. The arrangement canbe such that the entire counterweight for the stove flap is achievedusing a hinge according to the invention. A counterweight is then nolonger required for the second hinge of the stove flap. Accordingly, thesecond hinge of the stove flap requires no hinge according to theinvention, but rather only a simplified hinge, or a “dummy hinge”, whichcomprises a casing to which a plug-in part is pivoted. The second hinge,or dummy hinge, requires no spring-loaded spring guide provided with aroll guided through a cam plate of the plug-in part. This results in asimplification and cost savings.

[0023] It is advantageous if the dummy hinge comprises a spring, inparticular a leg spring, which is mounted on the casing and on theplug-in part. This spring can be used to generate a closing torque. Thisis advantageous particularly when the dummy hinge has a locking device.In this case, the spring or leg spring can generate a small closingtorque to maintain the function of the locking device.

[0024] It is advantageous if the dummy hinge has one or more features ofthe locking device. Accordingly, the plug-in part of the dummy hingepreferably has connected to it a locking part, preferably pivoting,wherein the pivot axis of the locking part is preferably shiftable. Thelocking part of the dummy hinge can have a wedge. It can also have anactuating projection. It is advantageous if the locking part of thedummy hinge has a face forming a stop surface, wherein the distancebetween the face and the pivot axis of the locking part preferablywidens as the locking part increasingly swivels out. The face ispreferably curved.

[0025] The face can have a contour shaped like a circular arc, oressentially shaped like a circular arc, wherein the midpoint of thecircular arc is spaced apart from the pivot axis of the locking part.

[0026] Embodiments of the invention will be explained in detail belowbased on the attached drawing. The drawing shows:

[0027]FIG. 1 the hinge in the closed position, rear view,

[0028]FIG. 2 the hinge according to FIG. 1 in the closed position, sideview,

[0029]FIG. 3 the hinge according to FIG. 1 and FIG. 2 in the openposition, at an opening angle of about 45°, side view,

[0030]FIG. 4 the hinge according to FIGS. 1-3 in the open position, atan opening angle of essentially 90°, side view,

[0031]FIG. 5 the hinge according to FIGS. 1-4 in the closed position,top view,

[0032]FIG. 6 the progression of torque as a function of the openingangle of the hinge,

[0033]FIG. 7 a modification of the hinge with a locking part in thelocked position,

[0034]FIG. 8 the hinge according to FIG. 7 in a partially open position,

[0035]FIG. 9 the hinge according to FIG. 7 and 8 in the locked position,

[0036]FIG. 10 a modification of the hinge shown on FIGS. 7 to 9 with alocking part, which has a face forming a stop surface, in a latchedposition with partially opened stove flap,

[0037]FIG. 11 the hinge according to FIG. 10 in a partially openposition,

[0038]FIG. 12 the hinge according to FIGS. 10 and 11 in the lockedposition,

[0039]FIG. 13 a section from FIG. 10, magnified view,

[0040]FIG. 14 a dummy hinge in the closed position, rear view,

[0041]FIG. 15 the dummy hinge according to FIG. 14 in the open position,side view, and

[0042]FIG. 16 the dummy hinge according to FIGS. 14 and 15 in the closedposition, side view.

[0043] The casing 1 of the hinge, which can also be referred to as thehinge body, can be built into the stove doors. However, a reversearrangement could also be selected, in which the casing 1 of the hingeis built into the stove or otherwise attached to the stove (not shown inthe drawings). A plug-in part 2 is secured to the casing 1 so that itcan pivot around an axis 10. The connection to the stove is made viaplug-in part 2, which is latched or otherwise secured to the stove. Thepivot axis 10 is situated in the rear lower part of the casing 1, on theside of the casing 1 facing away from the plug-in part 2. The plug-inpart 2 extends out of the casing 1.

[0044] A spring guide 3 is incorporated in the casing 1. The springguide 3 encompasses a guide rod 11 that extends upwardly out of thecasing 1, and has a stop 12 at its upped end. A compression spring 6 istensioned between this stop 12 and a plastic support 5. The stop 12 canbe designed as a nut (not shown in drawing), which can be turned on athread provided at the upper end of the guide rod 11 (also not shown indrawing), thereby making it possible to change the pre-stress of thecompression spring 6. In this case, the stop 12 designed as a nut can beadjusted using a tool, e.g., a screwdriver, a wrench or an Imbus wrench.The nut can also be designed as a wing nut or other hand-manipulatednut.

[0045] The plastic support 5 lies on the upper sealing surface of thecasing 1. It has a downwardly pointing part (not shown in drawing),which lies in a corresponding recess in the upper end surface 13 of thecasing, and through which the guide rod 11 of the spring guide 3 isrouted.

[0046] The lower end of the spring guide 3 has an outwardly pointingbracket 14, having secured to it a pin 7, around which a roll 15 ispivoted.

[0047] In addition, a guide pin 8 is incorporated, in particularpressed, into the spring guide 3, and guided in an additional cam plate4 provided in the casing 1. It is advantageous if the pin 8 lies deeper,i.e., closer to the roll 15, than shown on the drawing, since the torqueacting on the spring guide 3 then becomes smaller. The lever arm force hbetween the axis 10 and roll 15 takes place over the progression of theadditional cam plate 4. The additional cam plate 4 is shaped like alongitudinal slit, which runs straight and parallel to the direction ofmovement of the spring guide 3 in the upper, longer area, and bends tothe left, i.e., away from the roll 15, in the lower end area in themanner evident from FIGS. 2 to 4. As a result, the lever arm force hdiminishes to the completely open position shown on FIG. 4.

[0048] The plug-in part 2 accommodates a cam plate 9 through which theroll 15 reaches, and in which this roll 15 is guided.

[0049] The beginning of the cam plate 9, i.e., the point where the roll15 is located, has an initial section 16 with a certain inclination whenthe hinge assumes the closed position shown on FIG. 2, which generates apreset closing force.

[0050] This initial section 16 is followed by a convex section, whichcan be referred to as a cam 17. Provided on the side of the cam 17facing away from the initial section 16 is a neutral section 18, whichlies at a point on the cam plate 9 corresponding to an opening angle ofabout 20°. If the roll 15 lies in the area of the neutral section 18,the stove flap is in a stable position in which the opening torque (doortorque) of the stove flap is essentially exactly as high as thecounter-torque generated by the compression spring 6. In this position,the stove flap is in the so-called grill stop.

[0051] The ensuing area 19 of the cam plate 9 is designed in such a waythat the spring force generated over this section 19 essentially offsetsthe opening torque of the stove flap.

[0052] This will be explained below based on FIG. 6. Recorded there onthe horizontal axis is the opening angle of the hinge, starting with theopening angle 0° (closed position; FIG. 2) to the opening angle 90°(completely open position; FIG. 4). The torque is recorded in Nm on thevertical axis.

[0053] The bracket 20 represents the progression of the torque generatedby a stove flap with a weight of about 10 kg. This torque increases in asinusoidal pattern. It reaches its highest value at a full opening angleof 90°.

[0054] The cam plate 21 shows the progression of the torque generated bythe hinge when opening the hinge. This torque has a maximum of somewhatmore than 7.5 Nm at the outset of the opening process at an openingangle of about 5°. The very steep progression of the hinge torque up tothis maximum is generated by the inclination of the initial section 16of the cam plate 9.

[0055] In the ensuing area, the hinge torque drops of considerably. Itreaches the cam plate 20 in the area of about 17°. If the stove flap isopened further, the torque of the hinge generated by the spring forcepresented in the cam plate 21 essentially corresponds to the openingtorque of the stove flap presented in the cam plate 20. This can beachieved by appropriately shaping the section 19 of the cam plate 9.

[0056] When closing the stove flap, the torque generated by the hingepasses through the cam plate 22, which lies deeper than the cam plate 21due to the hinge hysteresis. The cam plate 22 drops below the cam plate20 at about 18°, decreases to approximately 0 Nm and again exceeds thecam plate 20 at about 13°. The 18° to 13° range corresponds to the grillstop, which assumes a stable position at the minimum of the curve 22i.e., at about 17°.

[0057] As an option, changing the control cam plates 21, 22 also makesit possible to influence the stove flap in such a way that it dropssoftly after opened at a specific angle, e.g., 60°. In this case, thecam plate 21 intersects the cam plate 20 at this angle, e.g., 60°, andruns under the cam plate 20 at larger angles.

[0058] By appropriately dimensioning the hinge, cam plates 21 and 22 canbe made to run at essentially the same distance on either side of thecam plate 20, as shown on FIG. 6. In a corresponding manner, divergenthinge dimensions make it possible to lower or lift cam plates 21 and 22,if needed.

[0059] Provided on the side of the plug-in part 2 in the lower part ofthe casing 1 is a recess 24, which is interspersed by the plug-in part 2and the bracket 14 of the spring guide 3. As a result, the roll 15provided on the bracket 14 is located outside the casing 1. This makesit possible to achieve a great distance, and hence high lever arm forceh, between the axis 10 and the roll 15. As a result of this high leverarm force, the compression spring 6 can be dimensioned relativelyweakly.

[0060] The force of the compression spring 6 is transmitted to the roll15 via the spring guide 3. The roll 15 runs in the cam plate 9 of theplug-in part 2. The shape of the cam plate 9 enables an adjustment tothe door torque in each open position. The neutral section 18 adjacentto the cam 17 permits an intermediate stop during the opening process orclosing process (“grill stop”).

[0061] The hinge is also suitable for stoves with very heavy doors. Inparticular in stoves with a device for pyrolysis cleaning, the doors orflaps are relatively heavy. They reach a weight of up to 14 kg.

[0062] The invention provides a hinge that makes do with a low number ofcomponents. The hinge characteristics can be freely selected via theshape of the cam plate 9. The torque can be offset in any open positionof the door or stove flap. In particular, the arrangement can be suchthat the torque generated by the spring is essentially exactly as highas the torque opening the door or flap. The hinge according to theinvention has a small structure. Because a compression spring lesssusceptible to vibration than a tension spring is used, no disturbingnoises are produced.

[0063] The support or plastic support 5 further dampens vibrations andnoise.

[0064] The spring pre-stress can be variable. Since the spring force isrelatively low, the spring pre-stress can be adjusted by hand. As aresult, a hinge can be used for different stoves. The hinge is adaptableto various stoves, or adjustable for different stoves.

[0065] FIGS. 7 to 9 show a variation of the hinge, in which theadditional cam plate 4′ lies deeper, i.e., closer to the roll 15, thanin the form of execution according to FIGS. 1 to 5. In addition, theadditional cam plate 4′ is curved throughout in such a way that thelever arm force h decreases as the hinge increasingly opens. Theadditional cam plate 4′ is curved in a way that the extent of thedecrease in the lever arm force h becomes larger as the hingeincreasingly opens.

[0066] For purposes of simplifying the drawing, FIGS. 7 and 9 do notshow the spring guide 3. Parts corresponding to those in the form ofexecution according to FIGS. 1 to 5 are marked with the same referencenumbers.

[0067] In the variation according to FIGS. 7 to 9, a locking part 25 isconnected with the plug-in part 2. The locking part has a pivot axis 26that is mounted in a guide 27 of the plug-in part 2 so that it can pivotand slide longitudinally. The locking part 25 can be pivoted around thepivot axis 26. The pivot axis 26 can be shifted in the guide 27. Theguide 27 is essentially straight.

[0068] The end of the locking part 25 lying opposite the pivot axis 26has a wedge 28, which is formed by the lower contour 29 essentiallyshaped like a circular arc and the upper contour 30 also shapedessentially like a circular arc, and which narrows proceeding away fromthe pivot axis 26. An upwardly pointing actuating projection 31 is alsoprovided on the locking part 25 between the pivot axis 26 and the wedge28.

[0069] The casing 1 of the hinge is connected with the stove flap. Theplug-in part 2 is hung into a counter-bearing 32, which is secured tothe stove. The counter-bearing 32 has brackets 33 into which anextension 34 of the plug-in part 2 engages. In addition, thecounter-bearing 32 has a bracket 35, on which the rounded outer end 36of the plug-in part 2 sits. As a result of the interaction between thebrackets 33 with the extension 34 and bracket 35 with the end 36, theplug-in part 2 and hinge casing 1 connected thereto along with the stoveflap connected thereto are reliably held in the position shown on FIG. 7to 9 by the dead weight of the stove flap. However, it is possible tomove the plug-in part 2 out of the brackets 33 and 35, namely bypivoting the plug-in part 2 relative to the counter-bearing 32 in theclockwise direction. During this movement, the extension 34 is moved outdownwardly out of the area between the brackets 33, while the roundedouter end 36 moves by the bracket 35.

[0070]FIG. 7 shows the latched position of the hinge. The plug-in part 2provides a recessed support surface 37, whose contour corresponds to thebottom surface 29 of the locking part 25. In the latched position, thelower surface 29 of the locking part 25 sits on the support surface 37.The upper surface 30 of the locking part 25 lies on the corner 38 of thecounter-bearing 32. The wedge 28 of the locking part 25 formed by thesurfaces 29, 30 is clamped between the support surface 37 and the corner38. The pivot axis 26 of the locking part 25 lies in the central area ofthe guide 27, somewhat outside the middle in the direction away from theaxis 10, as shown on FIG. 7. In this position, the wedge 28 of thelocking part 25 prevents the stove flap from lifting out. To lift outthe stove flap, the casing 1 of the hinge would have to be turnedcounterclockwise, which is prevented by the wedge 28 between the supportsurface 37 and the corner 38. The wedge 28 brings about an automaticinterlock, which prevents the stove flap from lifting out. The wedge 28cannot work itself loose. This precludes operator errors, whichotherwise could result in the stove flap being inadvertently unhinged iflifted in a closed position.

[0071] However, it is possible to open the stove flap, i.e., pivot thecasing 1 around the axis 10. After a slight pivot, the partially openposition shown on FIG. 8 is reached. If the stove flap is to beunhinged, the stove flap is opened further until an opening anglesomewhat larger than indicated on FIG. 9 is reached. In this openposition, the locking part 25 is pivoted counterclockwise around thepivot axis 26 until it reaches the position shown on FIG. 9. In thisposition, the locking part 25 extends through the slit 24 into thecasing 1 of the hinge. The latching lug 31 faces the axis 10. The stoveflap is subsequently pivoted along with the casing 1 somewhat toward theclosed position, until the locked position shown on FIG. 9 is reached.The outside end surface of the locking part 25 lies on the edge 39bordering the slit 24 from above. This prevents a further closing of thehinge, i.e., a further pivot of the hinge clockwise around the axis 10.If the stove flap is lifted in this locked positions the plug-in part 2is unhinged. The extension 34 of the plug-in part 2 slides downward outof the brackets 33, and the stove flap can be removed.

[0072] It can then be hung in again in a reverse movement. To releasethe locking mechanism of the locking part 25, the stove flap is opened abit more by pivoting the casing 1 out of the locked position shown onFIG. 9 counterclockwise around the axis 10. In this position, thelocking part 25 can be pivoted clockwise around the pivot axis 26. Thelocking mechanism is released as a result, and the stove flap can beclosed, i.e., the casing 1 can be further pivoted clockwise around theaxis 10. When closing the stove flap, the closed are 40 of the casing 1lying over the upper edge 39 of the slit 24 engages. The actuatingprojection 31 abuts this closed area 40 above the edge 39, and isreliably brought by it into the latched position shown on FIG. 7 andkept there.

[0073] FIGS. 10 to 13 show a variation of the hinge depicted on FIGS. 7to 9, in which the corresponding parts are provided with the samereference numbers. In the form of execution according to FIGS. 10 to 13,the locking part 25′ has a face 41 that forms a stop surface. The pivotaxis 26′ of the locking part 25′ is not shiftable, but rather fixed. Thecam plate 9 and additional cam plate 4 or 4′ are present in the form ofexecution according to FIGS. 10 to 13, but not shown in order tosimplify the drawing, with the same holding true for brackets 33 and 35.

[0074] In the latched position according to FIG. 10, the face 41 of thelocking part 25 abuts the stop edge 38 of the counter-bearing 32. Thisis shown on FIG. 13 on a magnified scale. The distance between the face41 and the midpoint M of the pivot axis 26′ rises as the locking part 25increasingly pivots clockwise, i.e., toward the latched position. Thisis achieved by having the midpoint of the bending radius r of the face41 lie above, i.e., on the side of the midpoint M of the pivot axis 26′of the locking part 25′ facing away from the axis 10. The midpoint m ofthe bending radius r is upwardly shifted by measure a relative to themidpoint M. As a result, the circular arc 42 formed by the radius raround the midpoint m, on which the face 41 lies, runs over the circulararc 44 in the area over the intersecting point 43 between this circulararc 42 and the circular arc 44 formed by the radius R around themidpoint M. The radius R corresponds to the distance between the corner38 forming a stop edge and the midpoint M of the pivot axis 26′ of thelocking part 25′.

[0075] The locking part 25′ drops down under its own dead weight whileturning around the pivot axis 26′, until its curved face 41 stopsagainst the upper outside horizontal edge of the counter-bearing window45, i.e., against corner 38, thereby latching the connection between theplug-in part 2 and counter-bearing 32. Upwardly shifting the radiusmidpoint m of the face 41 from the rotational point M of the pivot axis26′ of the locking part 25′ by measure a determines the permissibletolerance X in a horizontal direction and Y in a vertical direction. Inthis case, care must be taken not to exceed a value depending on thefriction of the paired materials to uphold the principle ofself-locking.

[0076]FIG. 12 shows the locked position, in which the face 41 abuts theedge 39. FIG. 11 shows the intermediate position.

[0077] FIGS. 14 to 16 show a dummy hinge 46 that can be used along witha hinge according to the invention, e.g., based on one of the forms ofexecution shown on FIGS. 1 to 13, for a stove flap. The hinge accordingto the invention is dimensioned in such a way that it can absorb theforces necessary for providing a counterweight. The invention makes thispossible. The second hinge of the stove flap can then be formed by thedummy hinge shown on FIGS. 14 to 16, in which a counterweight is notprovided. In particular, the dummy hinge according to FIGS. 14 to 16lacks a spring-loaded spring guide provided with a roll guided through acap plate of the plug-in part.

[0078] This gives the dummy hinge a considerably simpler design. Partscorresponding with those in the forms of execution on FIGS. 1 to 13 areprovided with the same reference numbers. The dummy hinge 46 encompassesa casing 1, in which a plug-in part 2 is pivoted around an axis 10, anda leg spring 47, which generates a small closing torque to maintain thefunction of the lock formed by a locking part 25′ and the othercomponents of the form of execution shown on FIGS. 10 to 13. The legspring 47 is mounted on the casing 1 and plug-in part 2. It is mountedwith one end in the-casing 2, winds round the bolt of the axis 10several times, and then proceeds with its other end to a stop bolt 48provided on the plug-in part 2, which it encompasses with its other end.

[0079] The dummy hinge 46 can be used in combination with a spring hingeaccording to the invention, e.g., according to one of the forms ofexecution on FIGS. 1 to 13, to save on costs. It functions as arotational axis, and generates no torque during opening tocounterbalance the door weight. The dummy hinge 46 requires neither acompression spring nor a mechanism for conveying the forces. This makesit less expensive to manufacture.

[0080] The invention and its advantageous further developments enablethe provision of a hinge according to the principle of dual-acting,simple or overlapped control cam plates. The progression of the camplate 9 brings about a stronger or weaker pre-stress on the spring 6, sothat the hinge torque can be controlled over the progression of theopening angle. The cam plate 9 can further be dual-acting, in such a waythat increasing the cam plate progression can generate a risingresistance or additional torque, thereby making it possible inparticular to increase the closure moment during the closing process orcreate latching points. The additional cam plate 4 offers another way toinfluence the torque progression over the opening area of the stove flapby changing the lever arm force h of the attacking force relative tofulcrum 10. In particular, overlapping the two cam plate controllers 9and 4 makes it possible to expand the range of torque influence, so thatthe size of the hinge can be considerably reduced. The interplay betweenthe two cam plates 9 and 4 allows one to achieve nearly any desiredhinge characteristics. In particular, the additional cam plate 4 permitsa decrease in the effective lever arm force h shortly before the endstop. The arrangement can be such that the torque growing over theopening movement again tapers off. The stove flap can be made to open byitself starting at a desired opening angle.

1. A hinge for a stove flap with a casing (1), to which is pivoted (10) a plug-in part (2), characterized by a spring guide (3) loaded by a spring (6) and provided with a roll (15), which is guided through a cam plate (9) of the plug-in part (2).
 2. The hinge according to claim 1, characterized in that the spring (6) is a compression spring.
 3. The hinge according to claim 1 or 2, characterized in that the roll (15) is provided on an outwardly pointing bracket (14) of the spring guide (3).
 4. The hinge according to one of the preceding claims, characterized in that the cam plate (9) has the inclination (16) that generates the required closing force in the closed position of the hinge.
 5. The hinge according to one of the preceding claims, characterized in that the cam plate (9) has a neutral section (18) with the hinge opened a specific distance, e.g., about 20°.
 6. The hinge according to one of the preceding claims, characterized in that the cam plate (9) is designed in such a way that the spring force generated by the cam plate progression essentially offsets the opening torque of the stove flap.
 7. The hinge according to one of the preceding claims, characterized in that the spring guide (3) is routed into the casing (1).
 8. The hinge according to claim 7, characterized in that the spring guide is routed into the casing (1) via a support (5), preferably a plastic support.
 9. The hinge according to one of the preceding claims, characterized in that the lever arm force (h) of the roll (15) can be varied relative to the pivot axis (10) of the plug-in part (2).
 10. The hinge according to one of the preceding claims, characterized in that the spring guide (3) has a guide pin (8) routed in an additional cam plate (4) of the casing (1).
 11. The hinge according to one of the preceding claims, characterized in that the pre-stress of the spring (6) can be varied.
 12. The hinge according to one of the preceding claims, characterized in that a stop (12) for the spring (6) can be adjusted, preferably by means of a nut.
 13. The hinge according to one of the preceding claims, characterized in that a locking part (25) is connected with the plug-in part (2).
 14. The hinge according to claim 13, characterized in that the locking part (25) can be pivoted (26).
 15. The hinge according to claim 14, characterized in that the pivot axis (26) of the locking part (25) is shiftable (27).
 16. The hinge according to one of claims 13 to 15, characterized in that the locking part (25) has a wedge (28).
 17. The hinge according to one of claims 13 to 16, characterized in that the locking part (25) has an actuating projection (31).
 18. The hinge according to one of claims 13 to 17, characterized in that the locking part (25′) has a face (41) that forms a stop surface.
 19. The hinge according to claim 18, characterized in that the distance between the face (41) and the pivot axis (26′) of the locking part (25′) becomes greater as the locking part (25′) increasingly pivots.
 20. The hinge according to claim 18 or 19, characterized in that the face (41) is curved.
 21. The hinge according to one of claims 18 to 20, characterized in that the face (41) has a circular arc contour, wherein the midpoint (m) of the circular arc (42) is spaced apart (a) from the midpoint (M) of the pivot axis (26′) of the locking part (25′).
 22. A stove flap and/or stove, characterized by a hinge according to one of claims 1 to 21 and a dummy hinge (46) with a casing (1), to which a plug-in part (2) is pivoted (10).
 23. The stove flap and/or stove according to claim 22, characterized in that the dummy hinge comprises a spring, in particular a leg spring (47), which is mounted to the casing (1) and to the plug-in part (2).
 24. The stove flap and/or stove according to claim 22 or 23, characterized in that the dummy hinge (46) comprises the features of one or more of claims 13 to
 21. 